Brake-shoe.



Patented June 16,1914.

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BRAKE SHOE. APPLICATION FILED 00T.25, 1912.

0. 1). PETTIS.

9 H z 0M a W 1 M1 CLIFTON D. .PE'ITIS, OF CHICAGO, ILLINOIS.

BRAKE-S HOE.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed October 25, 1912. Serial No. 727,805.

To all whom it may concern Be it known that I, CLIFTON D. Pn'r'rrs, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Brake-Shoes, of which I do declare the following to be a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification.

Figure 1 is a view in side elevation of a brake shoe embodying my invention. Fig. 2 is a plan view. Fig. 3 is a detail View of the reinforcing back. Fig. 1 is a detail view of the link from which the center attaching lug may be formed. Fig. 5 is a view of the link shown in Fig. 4 after it has been bent to shape. Fig. 6 is a View in vertical section on line (3-45 of Fig. 2. Fig. 7 is a view in cross section through the center lug on line T-7 of Fig. 6.

This invention has relation to that class of brake shoes for railway cars commonly known as reinforced brake shoes, in which the back portion and center lug of the shoe are strengthened by ductile metal parts.

The invention consists in the details of novelty hereinafter described, illustrated in the accompanying drawing and particularly pointed out in claims at the end of this specification.

My present invention is directed primarily to the provision of improved means for connecting an attaching lug or lugs to the reinforcing back of the shoe.

To this end, one of the main features of my invention consists in a brake shoe comprising a ductile metal back provided with a projecting part and a ductile metal fastening lug through which said pro ectmg part passes.

A further feature of my invention comprises a center lug formed; of U -shaped loops connected at their lower ends.

Other features of invention are hereinafter more fully set forth and particularly pointed out in the claims at the end of this specification.

Referring to the accompanying drawing, 10 designates the cast metal body of the shoe and 11 denotes a reinforcing back of ductile metal that is connected to the body of the shoe in the casting operation. In the drawing, the reinforcing back 11 is shown as formed of plate metal but, obviously, the precise construction of the reinforcing ductile metal back may be varied within Wide limits without departing from the spirit of the invention. The reinforcing back 11, in the form of the invention illustrated, is pro vidcd with a contracted central portion 11 having laterally projecting parts 12 adapted to engage the lower parts of the center attaching lug whereby the brake shoe will be connected with the brake head. Preferably, the reinforcing back 11 is also perforated and cut away, as at 13 and 14:, to better enable the cast metal to interlock with the reinforcing back and to form the raised end lugs 15 at the ends of the shoe.

In the preferred form of my invention, shown in the accompanying drawing, the center lug comprises two inverted, U shaped loops 20 and 21 connected at their lower ends by the parts 22 and 23, the sides of the loops 20 and 21 being embedded in reinforcing walls 2 1 and 25 formed integral with the cast metal body 10 of the shoe. Preferably, the ductile metal loops of the center lug are formed from a single wire link, illustrated in Fig. i of the drawing, this link being subsequently bent to the form illustrated in Fig. 5. After the link has been bent to the form shown in Fig. 5, its lower ends will be slipped over the laterally projecting parts 12 of the reinforcing back, after which these parts 12 will be bent downwardly and inwardly around the connecting parts 22 and 23 of the center lug, as shown in Fig. 6 of the drawing. After the ductile metal center lug has been thus attached to the'reinforcing back, these parts will be placed in a mold and the body 11 of the shoe will be cast in manner well understood by those familiar with the manufacture of reinforced brake shoes.

The cast metal forming the center walls or abutments 2 1 and 25 will flow about and interlock with the walls of the U-shaped members 20 and 21 of the center lug, and the space between the loops 20 and 21 of the center lug will allow such engagement of the cast metal walls 24 and 25 with the loops 20 and 21 that even. should there be any fracture of the walls or abutments 24: and 25, all danger of these parts dropping away will be avoided. The cast metal flowing through the cut-away portions 14: at the ends of the reinforcing back will form the projecting lugs 15, and the cast metal passing through the holes 13 in the reinforcing back will insure a more effective the invention may be employed without its adoption as an entirety.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A brake shoe comprising a ductile metal back provided on its outer edge with a laterally projecting tongue and a ductile metal fastening lug through which said projecting tongue passes.

2. A brake shoe comprising a ductile metal back provided at its opposite outer edges with integral laterally projecting parts, and a ductile metal fastening lug through which said projecting parts pass.

3. A brake shoe comprising a ductile metal back provided with projecting parts and'a'd'uctile metal fastening lug through which said projecting parts pass, said projecting parts being bent to better hold said lug in place.

4. A brake shoe comprising a cast metal body, a ductile metal fastening lug and a ductile metal back provided about its center with oppositely projecting parts formed integral with and extending from the outer edges of said back and passing through the side walls of said fastening lug.

5. A brake shoe comprising a cast metal body, a ductile metal fastening lug having its lower ends embedded in said cast metal body and a ductile metal back provided with projecting parts passing over and downwardly around the lower ends of said fastening lug.

6. A brake shoe comprising a fastening lug of ductile metal, and a ductile metal back having its side edges cut away adjacent the center and having tongues projecting laterally from the center, the lower ends of said fastening lug being engaged with said laterally projecting tongues of the ductile metal back.

7. A brake shoe comprising a center lug for attachment to the brake head, formed of two U-shaped loops connected at their lower ends and a ductile metal back provided with projecting parts bent to interlock with the lower portions of said center lug.

8. A brake shoe comprising a cast metal body, a ductile metal fastening lug having its lower end embedded in the cast metal body and having sides connected at the lower ends and a ductile metal back having laterally projecting parts at its opposite edges adjacent its center, said parts extending over the extreme lower ends of the ductile metal lug between its sides.

9. A brake shoe comprising a center lug formed of two U-shaped loops arranged in proximity and short bars extending directly between and connecting the lower ends of said loops.

10. A brake shoe comprising a cast metal body, a ductile metal center lug formed of two U-shaped loops arranged in proximity and short bars extending directly between and connecting the lower ends of the loops at opposite sides and cast metal abutments extending at the sides of said loops and wherein said loops and connecting bars are embedded.

11. A brake shoe comprising a cast metal body and a center lug formed of two U- shaped loops arranged in proximity and short connecting bars uniting the lower ends of the loops at opposite sides of the lug, said loops and their connectin bars being formed from a single piece of wire.

CLIFTON D. PETTIS.

Witnesses:

Gno. P. FISHER, KATHARINE GERLACH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

